12212021110221 has 24 divisors (see below), whose sum is σ = 17866939034880. Its totient is φ = 8036462187936.

The previous prime is 12212021110127. The next prime is 12212021110229. The reversal of 12212021110221 is 12201112021221.

12212021110221 is a `hidden beast` number, since 1 + 221 + 2 + 0 + 211 + 10 + 221 = 666.

It is not a de Polignac number, because 12212021110221 - 2²⁹ = 12211484239309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12212021110194 and 12212021110203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212021110229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1173136 + ... + 5079398.

It is an arithmetic number, because the mean of its divisors is an integer number (744455793120).

Almost surely, 2^{12212021110221} is an apocalyptic number.

It is an amenable number.

12212021110221 is a deficient number, since it is larger than the sum of its proper divisors (5654917924659).

12212021110221 is a wasteful number, since it uses less digits than its factorization.

12212021110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910745 (or 3910742 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12212021110221 its reverse (12201112021221), we get a palindrome (24413133131442).

The spelling of 12212021110221 in words is "twelve trillion, two hundred twelve billion, twenty-one million, one hundred ten thousand, two hundred twenty-one".